MARKET MONITOR / CATALOGUE Services 133,141 MCP listed 40,873 x402 92,350 Rails Base / Solana / Polygon / Arbitrum Imported 2026-10-31 · 3 sources
Task

Doi

9 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.

scholar-paper x402 REST usage

Resolve one research paper and fuse its metadata across OpenAlex, Crossref, Unpaywall and Semantic Scholar into a single cited JSON. Give a doi, arxiv, pmid, pmcid, openalex_id or title and get canonical metadata, author...

api.agentstools.dev Search & Research 2 calls / 30d checked 2026-10-31
0.02 USDC per call per call

Saylor Innovations DOI Citation x402 REST usage

Resolve a DOI to publication metadata - citation text, identifiers and source links

saylorinnovations.com Search & Research 4 calls / 30d checked 2026-10-31
0.01 USDC per call per call

TariffMonkee x402 REST usage

Health and payment-path check. Returns server time and confirms the x402 payment settled. The cheapest endpoint in the catalog at $0.001, intended for testing a client's payment flow.

tariffmonkee.com Crypto & Payments 23 calls / 30d checked 2026-10-31
0.001 USDC per call per call

doi-lookup x402 REST usage

Look up a DOI: full paper metadata (title, authors, journal, volume, issue, pages, year, publisher, funders, subjects), citation and reference counts, abstract, links and a ready APA citation. $0.01 per lookup.

intel.rallylive.ca Other services 2 calls / 30d checked 2026-10-31
0.01 USDC per call per call

DOI metadata and citation x402 REST usage

Metadata of a publication by DOI (Crossref): title, authors, journal or publisher, year, type, citation count, references, license, link and an APA-formatted citation.

api.vextorium.com Search & Research 6 calls / 30d checked 2026-10-28
0.003 USDC per call per call

Research Paper Search (Crossref) x402 REST usage

Search published research papers and articles across all publishers (Crossref): title, authors, journal, year, DOI, citation count and abstract, by relevance, date or citations. Use to find and cite sources.

bess-x402.onrender.com Search & Research 3 calls / 30d checked 2026-10-31
0.003 USDC per call per call

Doi x402 REST usage

DOI lookup: citation metadata, authors, journal, citations, abstract — Genesis402 / UnyKorn Operator Network

twin.unykorn.org Search & Research 2 calls / 30d checked 2026-10-27
0.003 USDC per call per call

scholar-paper x402 REST

Resolve one research paper and fuse its metadata across OpenAlex, Crossref, Unpaywall and Semantic Scholar into a single cited JSON. Give a doi, arxiv, pmid, pmcid, openalex_id or title and get canonical metadata, author...

payai.agentstools.dev Search & Research checked 2026-10-29
0.02 USDC per call per call

insurance-bulletins x402 REST

Recent Department of Insurance bulletins, circular letters and notices for a state, normalized to title, url, year and type with a linkback. Curated subset of reachable states, filterable by keyword and year, partial-on-...

payai.agentstools.dev Web & Scraping checked 2026-10-29
0.02 USDC per call per call

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